Refrigerating apparatus



Jan; 8 E929.

J w. JONES 1,698,440l

REFR IHERATING. AIhPARATUS Filed Aug. 12. 1925 2 sheets-sheet 1".

vINVENTOR l y 'BY AT mRNEYs S, 3229. 1,698,440 J. w. JONES REFRI GERATING APPARATUS Filed Aug. l2, 1925 Sheets-Sheet 2 5V.; 3f

.l zo' O 9 4 wlmi-3555s O O 5f: INVENTOR ma 7- r se/171 WMZ/76.5 fZf//wLa v BY w Z9 Z7 ATTORNEYS 30 plete apparatus;

j valve F in said pipe'l tor which iso Patented Jan. 8, 1929.

Ui'rED STATES 'PATENT OFFICE.

` :rosErH w. JoNEs, or NEW YoEE', N. Y.

BEFEIGEEATING Armures.

Applioationnled August 12, 1926. Serial No. 128,893.

This invention relates to refrigerating apparatus, an object of theinvention being to provide an improved construction of pump, incombination with high pressure and low 5 pressure coils, which producesan apparatus where leakage is prevented and where highly eicient resultsare had.

With apparatus such as heretofore known the leakage of gas occurred.This is not only l0 objectionable but causes many apparatus to,

be discarded after installation, and so far as I have any knowledge noeectualremedy has been providei for this serious defect prior to myinvention. p

It is therefore the primary object of my invention to provide anapparatus Where leakage is practically impossible and whichby reason ofan improved construction and arrangement of parts an economical and hihly elicient apparatus is produced. Y

ith these and other objects in view, the invention consists in certainnovel features oic construction and combinations and arv rangements ofparte, which will be more full Y hereinafter described and pointed outin t e claims. n In the accompanying drawings-- Figure 1 is a view inelevation, more or less diagrammatically illustrating 'my com- Figure 2a view in vertical section through my improved lpump and its support;

Figure 3 is-a view in vertical section on se the staggered line l-- of'Figure 2;

, Figure'4 is a top lan view of the ump.

= I shall rst describe the construction of lmy improved apparatus withparticular reference-to the pump and shall then set forth e the oeration.

Re erring nioredparticularly to Figure 1 A represents e lbe on which myimproved pump B is rigidly secured. C, C are high pressure -coils and Da low pressurecoil i vis connected by a ipe Ev with vthejhigliprespressure, reducing G represents a moeratively ,connected by a beltor other suitabxle mechanism with a combinasure coils, and avinl'a l v45a tion flywheel and fan J, on the drive shaft K of the pump, so thatthis member J iunctions to ecol the pump and the high pressure coils. I,ci course, do not. limit lmyself to the precise arrangement oftheparts-illustrated 5B and above described as this is ca able of .a

wide range or modification, but have illustrated Vwhat I believe to be:iQ-preferred v also ixedly secured to a vertically recipro# eatingblock 6 mounted in a guide 7 on the base 2. This block 6 has a slot 8therein in which a laterally reciprocating block 9 is mounted, and aneccentric 10 on shaft K turns in the block 9 to impart the desiredstroke to the piston. This stroke is relatively short and is positiveinl both directions.

The lower portion of the base. 2 constitutes a chamber 11 Jfor lubricant12, the

walls of the guide 9 being perforated as shown4 at 13k and 14 to permitthe lubricant to splash and thoroughly lubricate the movable parts ofthe piston drive. wall of the chamber 12 is preferably ro vided withwick -lled openings 15 'which prevent undue splashing and allow thechamber to be supplied with lubricant when occasion may require.

A disc 1e is rigidly secured on the-lower The upper portion of the rod 5and a flexible corrugated A tubular metal wall has its lower end securedto said disc, whereby saidlower end is closed, and its upper open endsecured to the lower open end of the cylinder 1. The mean diameter ofthe iiexible wall 17. (whiclias experts in the' art will understand-isapproximately the eil'ective diameter thereof) 1s practically the sameas the/internal diameter of the cylinder 1 or the external vdiameter ofthe pisteil4. y. 18 indicates a head which is fixed to'tlie` upper endof the cylinder 1,'andy this "head is formed with inlet and exhaustvalve chambers 19 and 20, respectively.v Spring' pressed check valves2l` and 22 control oommunication between the chambers 19 and 20 and thecy1in'der'1,'and these lvalves are of relatively' large diameter so thatwhen opened a relatively large passage' is provide for quick movement ofthe ofthe iston being short, suc .large'diameterpv' ves are desirable."I Y On the head 18 inlet and erhaust: valve thestroke k' lili casings 23and 24 are xed. These valve casings at their lower ends are in opencommunication with the chambers 19 and' 20, and at their upper ends arenormally closed by removable plugs 25 and 26, respectively.

The gas from the expansion coil D is ref turned to the valve casing 23through the medium of a pipe 26', and a needle valve 27 located in thecasing 23 controls a port 28 communicating with pipe 26. A second needlevalve 29 located in the casing 24 controls a port 30 communicating witha pipe3l which connects said port with the high pressure coils C, C.

32 represents a by-pass pipe which communicates at its lower end withthe interior of the cylinder 1, at a point which will not be coveredbythe down stroke of the piston, and with a port 33 Iin valve casing 23.rIhis ley-pass pipe 32 is provided with acheck valve 34, allowing theflow of gas upwardly thereof but preventing any movement of the gas inthe opposite direction, and a cut-oft' valve 35 is located in the pipe32 above the check valve 34 for a purpose which will hereinafter appear.

rIhe flexible corrugated tubular metal wall 17 is filled to the desiredlevel with oil 36, and I preferably employ castor oil which I nd to beeiiicient for the purpose. This oil acts as a seal for the piston andthe ilexible wall does away with the ordinary packing so that there isnomovement Whatever of the piston rod through any bearing which would beliable to leak. Furthermore, the

flexible wall, piston and the cylinder 1 form a chamber 37 which-issealed against leakage as the flexible wall is fixedly secured to thecylinder and expands and contracts with the movement of the piston.Furthermore, the mean diameter of the flexible wall (which, as is welllunderstood by those skilled in the art, is approximately the effectivediameter thereof), is practically the same as the diameter of the pistonso that in the movement of the several parts there is no variation inthesize of the chamber 37. The only point where as may probably leak isaround the packing of the piston 4 and such gas will pass into thechamber 37 and be returned to the now be explained.

The operation of my improved apparatus is as follows:

After installation it is of course necessary to remove the air in thesystem, and to accomplish this I close the port 30 through the medium ofthe needle valve 29 and remove the plug 26. The pump is then operated tocause the iston 4 to reciprocate and this movement ofp the pistoninduces a suction throughout the entire apparatus to draw the air pastthe valve 29 and `force the same past the valve 22 to the atmosphere.This pumping operation is continued unsystem as will til the air isremoved, and then the plug 26 is returned to its former position and theneedle valve 29 opened. During this initial operation of the pump thereis a possibility that portions of the oil 36 may be drawn through thepipe 32 and the cut-oil' valve 35 is provided to reduce the passagethroughl the pipe 32 or entirely close the same as may be founddesirable. Normally, however, this valve 35 is wide open. After the airIis exhausted from the apparatus, a gas supply pipe is coupled to theopening closed by the plu@r 25 and gas is drawn into the apparatus.'Ibis plug is then returned to position and the mechanism is ready foruse.

In normal operat-ion the piston is reciprocated, drawingthe gas from theexpansion coil D, through pipe 26', and discharging it under pressureinto the high pressure coils C; If during such operation any gas mayescape past the piston 4 into chamber 37 it will be immediately returnedto the coils by reason of the fact that the downward movement of thepiston 4 will induce a suction through the pipe 32 and thus return thissurplus gas to the system.

Referring to the operation of the apparatus in terms of pressure, it isdesirable that theexpansion coil have a pressure of approximately one tothree poun'ds, while the pressure in the coils C is apropximatelyseventy pounds. The pressure within the chamber 37 is maintained atapproximately two and a half pounds by the check Valve 34. Any excessivepressure will cause the check valve to open and the pressure to beautomatically reduced.

While I have illustrated and described in detail the specificconstruction shown in the drawings, it is to be understood that I do notlimit lmyself to such details but consider myself at liberty tomakelsuch changes and alterations as fairly fall within the spirit andscope of the appended claims.

I claim: I

l. In a refrigerating apparatus, a pump comprising a cylinder open atone end, a piston in said cylinder, a piston rod extending from thepiston through the cylinder, a

disc fixed on the rod 'beyond the open end llll of said cylinder, and aflexible, corrugated,

tubular, metal wall connecting said discand the open end of saidcylinder, the end of said flexible wall opposite said disc being alsoopen, whereb said cylinder, lexible wall, piston, and isc form a chambersurrounding said rod.

2. In a refrigerating apparatus, a pump comprising a cylinder open atone end, a piston in said cylinder, a rod connected to the piston andextending through the cylinder, a disc fixed to said rod beyond the openend of the cylinder, a flexible, corrugated, tubular, metal wallconnected at one end to the disc and at the other end to the open l endof the cylinder, said flexible wall being l end of said cylinder..

' it ljoins said cylinder being open, whereby .3. In .a refrigeratingapparatus, comprismg a cylinder open at one end, a'

piston in said cylinder, arod connected to said iston and extendingthrough v4said` c lin er, a disc fixed to said rod beyond- .a t e openend of the cylinder, a iiexilolfa':` corrugated, metal, tubular Wallconnecting said disc with the open end of said cylinder, the end of saidflexible Wall Where it joins said cylinder being open, whereby a chamberis formed by said cylinder, fiexible wall, disc, and iston, a bypasspipe connecting said cham r with the working end of said cylinder, and acheck valve in said pipe.

` 4.l In a refrigerating apparatus, a pump` comprising a cylinderopen'at one end, a piston in said cylinder, a rod extending through thecylinder beyond the open end thereof, a disc fixed on said rod beyondthe open end of the cylinder, an oil containing, flexible, tubular,corrugated, metal wall connectingsaid disc with the open end of saidcylinder, the end of said flexible wall where a ychamber is formed bysaid cylinder, flex ible Wall, piston, and disc, and a by-pass pipekconnecting said chamber with the Working end of said cylinder.

5. In a refrigerating apparatus, a pump comprising `a cylinder having anopen en d, a piston in sai piston and extendin beyond the open end ofsaid cylinder,` a isc on said rod, an oil containing flexible,corrugated, tubular, metal wall connecting said disc with the open en dof said cylinder, said 'flexible Wall being open where it 'oins saidcylinder, whereby achamber is` ormed by the cylinder, flexible wall,piston, and disc, a by@ l pass pipefconnecting said chamberwith theYworking end ofthe cylinder, and acheck fvalve in said pipe.

tubular, metal wall of approximately the?- 'same mean diameter as thecylinder 'connect-1; v ed at one endto' said disc and at the other endlWiththe open end of said cylinder, said ilez v y 4 l.

6.,In a refrigerating apparatum-ja pum i v comprising a cylinder o natits lower en 'zL-'apiston in said cylin er, .'a' rodx connectedv f'Withl'saidpiston and Aextending ont through- -r'gthe open end-ofsaid-cylinder, @a "disc,` fixed g jon 'said rod', and. al flexible,corrugated,

cylinder, a rod fixed to said' t e stroke of t e piston. ,t u

10.*As a neyrarticle offimanu'facture, a

f saidl l der, saidilexiblew ible wall being open at joins saidcylinder. H v

7. In a refrigerating apparatus, a pump comprising a cylinder. open atone end, a piston in said cylinder, a rod connected with said lpistonand extending open end of the'cylinder, a disc-on said` rod be ond theopen end of the cylinder, a lexthe vend ,-where l it ont beyond the ibe, corrugated, tubular,- metal wall 'ofw- 'i approximately thesamen'ieanY diameter as ".fsaidcylinder connected at'one end to saiddise and at'its other o en endto the open end of the' cylinder, w erebya chamber is 'to y formed b said cylinder, ilexible wall, pis

tom-and isc, and a by-pass pipe connecting said chamber `wththesworking'en'd of the cylinder" "ff-1*.l .bf 8. In `arefrigeratingappar'atusf, apump said piston'and extending out beyondthe. open end-ofl the cylinder, a disc `fixed on said rod beyond theopen end of the cylinder, aiiexible, corrugated, tubular, metal `wallwhose mean diameter is approximately that of said cylinder` saidflexible wall being connected at one end to said disc and at its otheropen end to the open end of said cylinder, whereb a. chamber is formed'by said v cylinder, flexible wall, piston, and disc, a

ton and extending out through .the o en end leirible,"4 corrugated,tubular, metal wall connecting sai disc withI the 'o en end of saidcylinder, said liexible wall eing open lwhere it is' connected to saidcylinder said c linder havin below an outlet at apoint corrugated,tubular, Zfnietalwall connecting l having an outlet ata point below thestroke of the` outlet;` w JOSEPH W. JONES.

ng end of the cylinder, and a isc with the; vpen -endj-of said'. cylinybeing 'open where it Y. is'v connected to said" cylinder, said cylinder*comprising a cylinder. open, at one-end, a piston in said cylinder? arod connected to `ofsaid cylinder, a disc fixed onsai rod, a

icc

`piston rod connected tosaid piston Land veir- 'f tending lout' .throughl' the' l open e, endv of sai-d 1.cylinder,.a disc fixedl on said rod, aexible,

lie

me. piston, and acheck valve in said y y' 9:1` therein, a piston rodconnected to said pis-

